Yeah, I don't think there is an easy solution to it. The options that I see on the table is on one hand to persevere. Maybe with enough willpower and determination that craving will subside. Maybe. I doubt it, but maybe. It depends. Maybe you can find the source of the reason why somewhere inside you. If there is a why. There doesn't have to be a reason, it might simply be part of your sexual orientation, a need. If there is a reason, you might be able to do something about it by addressing it. If there isn't, well, then you are going to have to decide what you fear more. Your husbands reaction to you opening up to him about what is going on inside you, or the rest of your life with this desire, unfulfilled.

Telling him, and seeing what comes of that, or not telling him, and going on as you have, and maybe finding a way to numb it with ice (masturbation, pornography, writing erotica, fantasizing while having sex with him, role playing, perhaps)... that's really all I see.